certain vs foregone conclusion

certain is not a noun while foregone conclusion is a noun.

Word	Noun	Adjective	Verb	Adverb
certain	No	Yes	No	No
foregone conclusion	Yes	No	No	No

certain (noun)	foregone conclusion (noun)
	something that is certain
	an inevitable ending

certain (adjective)	foregone conclusion (adjective)
established beyond doubt or question; definitely known
having or feeling no doubt or uncertainty; confident and assured
certain to occur; destined or inevitable
established irrevocably
exercising or taking care great enough to bring assurance
definite but not specified or identified
reliable in operation or effect